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Finding the Fourth Proportional to 123,220.64, 169,930.68 and 77,819.60

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Solution

The fourth proportional to 123,220.64, 169,930.68 and 77,819.60 is: 107,319.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,220.64 : 169,930.68 = 77,819.60 : x
  2. Step 2: Convert to fraction form
    123,220.64/169,930.68 = 77,819.60/x
  3. Step 3: Cross multiply
    123,220.64x = 169,930.68 × 77,819.60
  4. Step 4: Simplify right side
    123,220.64x = 13,223,937,545.33
  5. Step 5: Solve for x
    x = 13,223,937,545.33/123,220.64
  6. Step 6: Final answer
    x = 107,319.18

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